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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2015-08-20 17:28:44 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2015-10-14 14:32:06 +0200
commit1ec2772e0c3ca3159035c03165355e355efc326b (patch)
tree469be3ba9032d367e4a796d6a31b25ccaab0d06a /arch/s390/kernel/smp.c
parentacdc9fc9a8121ce2ebcd7533bd72852c20b353f3 (diff)
s390/diag: add a statistic for diagnose calls
Introduce /sys/debug/kernel/diag_stat with a statistic how many diagnose calls have been done by each CPU in the system. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/smp.c')
-rw-r--r--arch/s390/kernel/smp.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index c6355e6f3fcc..f7db48b61dcf 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -33,6 +33,7 @@
#include <linux/crash_dump.h>
#include <linux/memblock.h>
#include <asm/asm-offsets.h>
+#include <asm/diag.h>
#include <asm/switch_to.h>
#include <asm/facility.h>
#include <asm/ipl.h>
@@ -375,11 +376,14 @@ int smp_vcpu_scheduled(int cpu)
void smp_yield_cpu(int cpu)
{
- if (MACHINE_HAS_DIAG9C)
+ if (MACHINE_HAS_DIAG9C) {
+ diag_stat_inc(DIAG_STAT_X09C);
asm volatile("diag %0,0,0x9c"
: : "d" (pcpu_devices[cpu].address));
- else if (MACHINE_HAS_DIAG44)
+ } else if (MACHINE_HAS_DIAG44) {
+ diag_stat_inc(DIAG_STAT_X044);
asm volatile("diag 0,0,0x44");
+ }
}
/*